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Copyright © 2012 Discount Two-Way Radio Corporation - North American Distributor
BR850
TM
Professional Two-Way Radio Instruction Manual
6
Intrinsically Safe Radio Information
Certification -
Intrinsically Safe
Intrinsically Safe Classification
“Intrinsically Safe” is a fire safety rating given
to the equipment by SGS North America Inc.
according to ANSI/UL 913 (U.S.) and CSA C22.2
No. 157 (Canada) certification standards.
When the equipment is given this rating, it is
considered safe to use in certain flammable
or combustible atmospheres. Flammable
atmospheres have been categorized by Class,
Division, and Group as described below:
I.S. Classes I, II, III, Division 1,
Groups CDEFG, T3
Class
Material
I
Gas, Vapor, Liquid
II
Dust
III
Fiber, Flying
Area Classification:
Division
Description
1
An area where there is or could be
an explosive atmosphere most of
the time under normal operating
conditions
2
An area where an explosive
atmosphere exists only under fault
conditions
ANSI/UL 913
C
CSA C22.2 No. 157